Improvement in scroll-saws



N.PErERs, PHDTQLITHDGRAPHER. WASHINGTON. Dv c.

N.PETERs, PMOTO-LITHDGRAPHER. WASHINGTON. D C,

AUGUST M. SCHILLING,

OF CHICAGO, ILLINOIS.

AIMPROVEMENT IN SCROLL-SAWS.

The Schedule referred to in these Letters Patent and Jtoelating part of the same.

To all whom it may concern.-

Be it known that I, AUGUST M. SCHILLING, of' Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Scrollsawing Machine; and I do hereby declare that the following' is a full, clear, and exact'description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawing forming partof this specification, in which- Figure l,.Sheet I, is a front view ofiny improved sawing-machine, partly in section, to, show the construction.

Figure 2, Sheet I, is a detail view of lthe 'rear side of the cross'head.

Figure 3, Sheet I, is a detail view of the cam or wedge thumb-screw. y

Figure 4, Sheet Il, is a detail sectional view ofthe machine.

Figure 5,Sheet 1I,is an under-side view of the middle part of the table and its attachments.-

Figure 6, Sheet II, is a detail under-sideview of' the brake.

Similar letters ofret'erence indicate corresponding parts.

My invention has for its object to improve the construction of my improved scroll-sawing machine, patented March 30, 1869, and numbered 88,417, so as to.

make it more durable, more effective in operation, and more convenient in use and o.

It consists in the construction and con'ibination ot' various parts ofthe machine, as hereinafter more fully described.

A is the il'aiue, and I3 isthc table el' my improved machine.

C is the driving-shaft, which revolves in bearings attached to the lower part of the. frame A, and-to which is att-ached a fast pulley, el, and a loose pulley, c?, to receive the driving-belt.

'Ilo the inner end ofthe driving-shatt (l is attached aerank-wheel, I), that drives the saw.

E are two brake-levers, pivoted toa cross-bar of the ira-me A, upon cach side of the crank-wheel I), so that, when their lower ends are forced apart, their upper ends are forced toward each other, and against the face of the said crank\\:he el I), to stop the movement of the saw without hearing upon the journals of the driving-shaft. v

I is a bar, slidinglongitudinally in keepers attached to the tl'auieA, and which has two pins, G, attached to it, between which the drivh'ig-belt passes.'

The .slide E is moved to shiit they belt from one to the other of the pulleys oI c, as required,'by the lever ll, pivoted to a support attached to the frame A, and ille upper end of which moves along an arm,h, at-

tached to the frame A, and provided with a stop, stops, or notches, to indicate when the belt has been properly shifted.

'Io the inner end of the slidingr bar .F are attached two springs, I, having projections or cams formed upon them in suoli a way that, when the belt has been shifted to the loose pulley o2, the said cams or projections will force out the lower ends of the brake- 'levers E, applyingr said brakes to thc crank-wheel D'.

If the lever H is moved past the stop upon `the arm lz', the projections of thc springs I will pass the levers IG and release the brake while the 'belt is still-upon the loose pulley, allowing the machine to be conveniently turned and adj ust-cd by hand, thus saving much time 'and friction. A

Io the crank-pin of. the `crank-wheel I) is pivotcd the lower end oi' the` connecting-mdd, the upper end of which is pivotcd to the cross-head K.,

rIhe lower end ofthe saw is placed between, and is held by, the jaws L, which have tenons formed upon them, which pass through a slot in the cross-head K, and are held in place by adovetailed piece, It', as shown in iig. 2.

Ihe jaws L are forced and held together, to clamp 'the lower end of the saw, by the levers M, the lower ends of which are forced apart bythe thumb-screw N, the body of which is made conical, as shown in iig. 3, so as to act as a cam or wedge to operate said levers, and so as to hold thick or thin saws, by simply screwing it in a lesser or greater distance.

Ihe jaws L are held apart, to allow the end of. the saw to be conveniently inserted between them, by a small spring, interposed between their tenons, as shown in iig. 2.

By this construction the saw will be inthe same place, whether thick or thin, wide or narrow, the back ofthe1 saw resting against the cross-head, and the'saiil saw is secured in plaec bysimplytightening the thumb screw N.

Ihccross-head l slides up and down -iu ways O, adj ust-ably attached to the way-hed I).

"Ihe ways O are made in two parts or pieces, as showuin lig. 4, and are adjusted by the set-screws Q, whichare swivclcd to ears formed upon the way-'bed be easily adjusted in place or straightened when worn. Ihe 'ays 0 are secured in place, when adjusted, by vtheV screws It, which passethrough transverse slots in the said ways O, and screw int-o the said way-bed I. S are oil-cups fastened to each end of thc connecting-rod J, to oil the pivoting-pins. Similar oil-cups should' be placed upon each of the ways O, to keep them oiled.

The way-bed I is adjusted and held in vertical po- I), and screw into ear-nuts formed upon the ways O,` so that, by turning the said'serews Q, the ways O can.

sition by the rods T, which have serew-tlncads formed upon their middle parts, which pass through Veyes t'ormed upon the side edges of the lower end ot' the said way-bed l, and upon which are placed nuts, 1, one upon each side ot` che said ears, so that the said way-bed may be conveniently and accurately adj usted in a vertical position, and, when adjusted, securely and firmly held.

U is a plate, slotted in its center for the passage o1 the saw, and which is sunk into the table B sothat its upper surface may be tlnsh with the upper surface otthe said table, as shown in 1 and 4.

Upon the under surt'ace ot the plate U are placed two guide-beds, Y, which move in grooves in the under side ot' the said plate l', to cause lthem to move squarely, and which are held in place by two bands, W', which are secured to the vsaid plate U by screws or bolts, and by the thumbscrew y1c', iso as to clamp ythe said gniilebcds V in place, or allow them to be moved as may be desired.

Ip the guide-bedsV are placed two guides, X, which are moved or adjusted by two screws, Y, the heads of which work in slots in the said guides X, aml which screw into nut-ears t'oruied upout-he guide-bed Y.

moved back and torth along` the under surface ot' the plate. by the' lever l', which is pivoted to the plate U, and the' end ot' which enters a notch in the side edge of the said guide A', as shown in iig. 5.

The guide A' is guided in its movements by a screw attached to the plate L', and which passes through a slot in the. saidguide A', and has a. lever-nut, i,

placed upon it, by means ot' which the. said guide A may be securely clamped when adjusted.

ln agroove in the uppersurtace ntf-the plate U works two slides, which are attached to the ends ot' the two middle leaves b ot the table B.

rlhe forward or adjacent ends ot' the slides 1)' arc slotted or notched, as shown in figs. l, 4, and 5, t'or the passage. of the. saw.

'lhe slides D' are moved back and t'orward, accord-v ing to the width ot' the saw, so as .to always torm aclose surt'ace around Ithe. saw.

E' is the upper guide-arm, upon the lower end oi' which are formed grooved and slotted tlanges, in which `thc guide-bars l" work.

G' are the guides, which work in and ont ot the guido-beds 'F' as they are operated by the screws H', which work in nut-ears tbrmed upon tlie tlangcs ot' the arm E', and the. heads ot which cuter grooves in the guides G'.

The guide-beds li" and guides G are secured in place,

when adjusted, by the thumb-screw 1', as shown in Afig. 4.

'.Lhe back olthe saw rests against. the guide J', which is moved back and forward in a groove in thel lower end of the guide-arm E' by a hand-nut, K', swiveled to the said arm E', and working upon a screw formed upon or attached to the said guide J'.

Then a very narrow saw is to be used, its upper end is lastened .to a light cross-head, L', where vit. is

'secured in place bya pin, M', passing through ears tormed upon the said cross-head, entering a notch in the forward edge of thesaw, and held forward to its place by a spring, N.

The' cross-head L' works in ways U', secured tothe guide-arm E' by bolts passing through 'slots in said ways, and screwing into said guide-arm, so that the said ways may be'convcniently adjusted as required.

lhe cross-head L', when not required for use, is secured to the upper pait of the guide-arm Ef by a small button, i', pivoted to one of th'e ways O'..

The guide-arm E' is pivoted to the slide-block t" by a bolt or pin, so that it. may be conveniently swung back out otl the way, for convenience in passing the upper end otl the saw through a hole in the timber to be sown.

The guide-arm E' is held in place, to guide auf). snpport the upper end ot' the saw, by the catch-hook Q',

which is forced uiward b f the sario" R' to enter a .Y

l .i l .s a

slot in' the lower end of the sliding block P'.

The catch. Q is drawn down, to unfasten the guidearm E', by the lever S', whiclris pivot-ed to the said arm E', and the upper end of which works against the outer end of the shost lever T', which is pivoted to the arm ll, and the innc'r end ot" which works against a shoulder formed upon the said catch Q'.

1U' is a spring, the lower end otl which is connected with a piu, the ends of which slide in slot-s in the rear part. of the arm The upper end of the spring U' is connected with the slide-block P', so that, when the catch Q' is withdrawn, the said spring U may move the guide-arm E', rearward and upward.

The sliding block I", to which thev guide-arm l" is pivot'ed, issecured to the extension-plate V' by a. handnut, placed upon a screw attached to or passing through the said sliding block l",'and through a vertical slot in the said extension-plate V', so that the guide-arm 1 1' c an be conveniently raised andlowered, to adjust it to the thickness ot' the stuft being sawn.

The extension-plate Y is secured by' bolt-s to a. plumb-block, W2.

lhc plumb-block W is ma'dc narrower than the extension-plate Y', and is secured to a beam, or to a post projecting downward from a beam, and is secure-d, as nearly plumb as possible, by three brace-rods or bolts, X'. Y

The holes for the bolts that secure the extensionplate to the plumb-block W are elougat-edlaterally, so that the said extension-plate maybe moved to either side to adjust il.

In fach side ot' the extension-plate V' are two setscrews,-.\f', and in the block W2 are t'our set-screws, Z', so that, by means et' thev eight set-screws Y' r', the guide-arm Ennay be cmivenicntly adjusted to an eX- act vertical position.

l-laviug thus described my invention,

l claim as ne and desire to secure by Letters l Patent- 1. The brake l'ormed bythe levers E and spring-y cams l, in combination with the bclt-shifter F G H and crank-wheel 1 attached to the drivingshat`t, s ubstantially as Aherein shown and described, and for the purpose set t'orth. 2. Ilhe jaws L, levers M, and cam or wedgc-sorew N, t'or securing the lower end ot' the saw to the crosshead K, substantially as herein shown and described, and t'or the Vpurpose set forth.

3."1he jaws L L, (for holding a scrollsaw,') distendcd bya spring, l, interposed between their tenons, and applied to secure a 4more eonrenimit insertion ot the sajw, as described.

4. The oil-cups'S. applied to the. connecting-rod J and ways 0, as and for thc purpose described.

' 5. `hecombination ot't'he screw-nuts t'and threaded sleeve with the brace-if'ods T and way-bed l), to-support said nay-.bed and enable it to be accurately plnnibed, substantially as herein shown and described.

(i. lhe combina-tion ot' the guides X, guidebeds V, bands jW, set-screw 1e, and adjusting-screws Y, with each other, and with t-he plate U, substantially as herein shown and described, and for the purpose set forth. d 7 .The combination ot' t-h`e rear guide A', lever B', and' lever-nut G', with the platt. U and guidesl X, suhstaiitially as herein shown and described, and for the purpose set forth. i t f r 8. '.Lhc combination ofthe guides G', guide-beds F,

adjusting-screws H', and clamping-sereni', with eooh other and with the swinging or pivoted arm'E', substzlntiailyos herein shownv und described, and for the purpose setI forth.

9. The combination of the rear guide J and swiveled nut K with the swinging guide-arm EQ'and with the adjustable guide G', guidefbeds F', aud clampingscreiv l', substantially as herein shown and described,

and for the purpose set forth.

10. The vcombination ofthe spring U', spring-catch QR, and levers S' and T', with the guide-arm E', and

`| with the sliding block P', substantially as herein shown I :md described, and for the purpose sei; forth.

'11. rlhe combination of the plumbing-Mock W2, supporting :md adjusting-rods X,'amd set-screws Y Z',

,l with eachother, and with the extension-plate Vf audswinging guide-arm E, substantially as herein shown and describeth'aiud for the purpose set forth.

AUGUST M. SOHILLIN G. Witnesses:

A. H. LARNED, J. l. Stv. CLAIR. 

